An Art Nouveau diamond ring, France, circa 1900, of whiplash design

An Art Nouveau diamond ring, France, circa 1900, of whiplash design, set with circular-cut and cushion-shaped diamonds, mounted in silver and gold, size M1/2, French assay mark for 18ct gold, case

Cf.: Henri Vever, French Jewelry of the 19th Century, English edition translated by Katherine Purcell, London, 2001 (originally Paris, 1906-8), p.1035, for a selection of comparable rings by Maison Péconnet